Answered by Shaykh Faraz Rabbani
If one inserts fingers into ones nose in the state of wudu, does the wudu become makruh?
Answer:
Walaikum assalam,
No. It is, in fact, recommended to do so while washing out the nose, when reasonably possible. [Radd al-Muhtar, Hindiyya]
Walaikum assalam,
Faraz Rabbani.